grammar.adverbs.position
Where adverbs go
Close to what they modify: after the verb (habla bien), before adjectives (muy caro). Nothing splits haber + participle: ya he comido, never *he ya comido.
grammarB1✓ Reviewedv0.1.0
Explanation
Adverbs go close to whatever they modify. Adverbs of manner and quantity normally follow the verb: trabaja mucho, cocina bien, llueve poco. Degree adverbs go before the adjective or adverb they intensify: muy caro, bastante lejos, demasiado tarde.
Sentence adverbs that comment on the whole clause can float, often to the front: francamente, no entiendo; afortunadamente, llegó a tiempo; quizás tengas razón.
Two hard limits compared with English. Nothing may come between haber and the participle in compound tenses: siempre he vivido aquí (never *he siempre vivido), ya hemos comido. And negation hugs the verb: no siempre means 'not always', while nunca means 'never' — position changes the meaning.
Examples
We have always worked together.
Region: global
He's not always right.
Region: global
We have always worked together, though we don't always agree.